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Thread: Fault codes, no boost Mk6 GTD

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  1. Fault codes, no boost Mk6 GTD 
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    Hi guys,

    Have recently replaced the engine in a 62 Mk6 GTD with the CFGB engine.

    Engine running OK but getting no boost from the turbo, I did rebuild the turbo with a new core as it had been water damaged, tried to put it back together as close as possible to the original setup but I'm wondering if I've possibly got the actuator positioned incorrectly? It's making no boost and I have the following fault codes:

    P007300 - Ambient air temperature circuit high
    P023800 - Turbocharger boost sensor (A) Circ. High Input
    P011300 - Intake air temperature sensor 1 Bank 1 Circuit High
    P256300 - Turbocharger boost control position sensor circuit Range/performance

    Not sure if they're all related, gonna have a look at it tomorrow. Any suggestions? Cheers
     
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  2. Re: Fault codes, no boost Mk6 GTD 
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    Looks like a wiring fault

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  3. Re: Fault codes, no boost Mk6 GTD 
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    Quote Originally Posted by Crasher View Post
    Looks like a wiring fault
    Realised I'd left the ambient air sensor unplugged so that code is now gone.

    Just have the 3

    P023800 - Turbocharger boost sensor (A) Circ. High Input
    P011300 - Intake air temperature sensor 1 Bank 1 Circuit High
    P256300 - Turbocharger boost control position sensor circuit Range/performance

    I'm now just trying to figure out how to check if the actuator is set up right, can't see any other obvious issues.
     
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  4. Re: Fault codes, no boost Mk6 GTD 
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    Managed to figure out the wastegate actuator setup with a bit of research apparently when the wastegate rod is completely retracted voltage should be 0.65-0.85V and fully extended 3.3-3.9V, mine was at 4.6v fully extended to I've adjusted that and its now at 3.5V extended and thats taken the P256300 code away.

    Was hoping that would sort it all out but still have these two:

    P023800 - Turbocharger boost sensor (A) Circ. High Input
    P011300 - Intake air temperature sensor 1 Bank 1 Circuit High

    Not quite sure where to start with these now, have checked over visually. May try swapping sensors just to see what happens as I have some spares.

    2 Faults Found:


    5169 - Manifold Pressure / Boost Sensor (G31)
    P0238 00 [167] - Signal too High
    MIL ON - Not Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 2
    Fault Frequency: 1
    Mileage: 95923 km
    Date: 2127.14.31
    Time: 01:11:07


    Engine speed: 0.00 /min
    Normed load value: 0.0 %
    Vehicle speed: 0 km/h
    Coolant temperature: 23 °C
    Intake air temperature: -38 °C
    Ambient air pressure: 980 mbar
    Voltage terminal 30: 11.480 V
    Unlearning counter according OBD: 40
    Charge air pressure: actual value: 3000 hPa
    Engine status: COENG_READY
    Outside air temperature: 18.5 °C
    Particle filter: difference pressure: 4 hPa
    Control Module temperature: 12.3 °C


    5282 - Intake Air Temp. Sensor (G42)
    P0113 00 [039] - Signal too High
    Not Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 2
    Fault Frequency: 1
    Mileage: 95923 km
    Date: 2127.14.31
    Time: 01:11:07


    Engine speed: 0.00 /min
    Normed load value: 0.0 %
    Vehicle speed: 0 km/h
    Coolant temperature: 23 °C
    Intake air temperature: -38 °C
    Ambient air pressure: 980 mbar
    Voltage terminal 30: 11.480 V
    Unlearning counter according OBD: 40
     
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  5. Re: Fault codes, no boost Mk6 GTD 
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    All sorted, it was the 4 wire plug on the gearbox which runs across to the boost sensor, seems like I'd just not clipped it in all the way. Good place to check continuity of the wires too though if anyones having the same issues.

    Just gotta try to flush the cooling system now because the oil had mixed with it from the previous engine failure!
     
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